Quantcast raw numbers are usually way off, but their relative values usually aren't that out of line with reality. A big drop in Quantcast is something to take

Quantcast raw numbers are usually way off, but their relative values usually aren't that out of line with reality. A big drop in Quantcast is something to take note of, barring something like measurement error. That said, I just checked my employer's traffic as measured by Quantcast, and it says that we've lost 60% of our year-over-year traffic, too, though I know for a fact that we are in fact growing on those metrics, so I'm inclined to disbelieve that these numbers are accurate.